Hi,

could you check whether this might be a MTU size problem?

Run sudo ifconfig to check the current MTU size for the give interface.

To do a MTU disovery, try this:

ping -s 1472 -M do ubuntu.com

For a MTU size of 1500, the above command should work (normal ping
replies).

If you'd instead receive errors like " ... Frag needed and DF set ... ",
you should lower the packet size (-s 1472) and run the command again
until you receive normal ping replies without fragmentation.

Afterwards you should adjust the MTU for your interface to the highest
working packet size + 28.

You can set the new value for a specific interface by running for
example sudo ifconfig eth0 mtu 1472 or set a static value in
/etc/network/interfaces with "mtu 1472".

-- 
no ftp and http upload with D-Link router
https://bugs.launchpad.net/bugs/296353
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